Temporary framing for use in concrete-work.



No. 835,724. PATENTED NOV. 13, 1906.- R. ANDERSON. TEMPORARY FRAMING FOR USE IN CONCRETE WORK.

APPLICATION FILED AUG. 19, 1905.

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\ RKANDBRSON. TEMPORARY FRAMING FOR USE IN UONGRE TE WORK.

APPLICATION FILED AUG. l9 1905.

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n: NORRIS PETERS co, WASHINGTON, n. c.

UNITED STATES PATENT OFFICE.

CONCRETE CONSTRUCTION CORPORATION OF OHIO.

COMPANY, OF CINCINNATI, OHIO, A

TEMPORARY FRAMING FOR USE IN CONCRETE-WORK.

Specification of Letters Patent.

Patented Nov. 13, 1906.

Application filed August 19, 1905. Serial No. 274.816.

To (all whom it may concern:

Be it known that I, ROBERT ANDERSON, a citizen of the United States of America, and a resident of Cincinnati, county of Hamilton, State of Ohio, have invented certain new and useful Improvements in Temporary Fram- :ng for Use in Concrete-fork, of which the following is a specification.

My invention relates to the framing with which the metallic members of buildings in the course of construction are surrounded in order to form molds for the plastic concrete covering the said members to hold the concrete in shape until it hardens.

The object of my invention is a framework which may be readily removed after the cement has set. This object is attained by the means illustrated in the accompanying drawings, pointed out in the specification, and set forth in the claims.

Referring to the drawings, in which like parts are indicated by similar reference-letters wherever they occur throughout the various views, Figure 1 is a plan view of a portion of flooring supplied with a framework embodying my invention, the horizontal sheeting being partially broken away to show the parts beneath it. Fig. 2 is a sectional view taken upon line :0 0c of Fig. 1. Fig. 3 is a sectional view taken upon line y y of Fig. 1, upon an enlarged scale. Fig. 4 is a detail view of the swinging supporting-arm and the I-beam. Fig. 5 is adetail perspective view of one of the braces for the joists. Fig. 6 is a side elevation of a part of one of the sides of the frame. Fig. 7 is an elevation of a joist supplied with the swinging supporting-arms at its ends.

Referring to the parts, I-beams A, A, A and A are secured together and mounted upon columns A in the usual manner.

The vertical sides of the mold for holding the concrete about the web of the I-beams are formed by the sides B, B, B and B of a wooden rectangular frame, which members are secured to each other at their ends by nails or in any other suitable manner. This framework has secured to the ends B B battens b, b, b, and b to which metallic swinging arms C- are pivoted. These arms C are turned outward at their ends 0 and terminate in a notch c, which engages the I-beams A A to support the framework. Sides B B have secured to them at intervals a series of battens 5 At the side of each batten b, 1), b b and b the lower edges of the sides B, B, B and B have notches b the lower ends of which notches are covered by a metallic strip b, leaving a hole large enough to allow the members 0 of the supporting-arms C to pass through them.

Within the frame composed of the members B B after it has been supported upon the I-beams a series of joistsD are placed adjacent to each of the battens b. Joists D are of a length slightly less than the Width of the frame B B To the ends of each joist D swinging supporting-arms C are pivoted upon a bolt C which projects through the joist and upon the side opposite the arm C receives a metallic brace E, which is slotted at e to pass over the bolt C Braces E have at their ends sharpened burs e to be. forced into the battens b, to brace the battens so as to hold the members B B at a fixed distance apart and at a fixed distance from the I- beams A A After the joists have been secured in place sheeting F is placed over the top of the joists, meeting the members B B of the frame to form the complete sides for the metal surrounding the I-beam. The opening beneath the I-beams is the last to be closed, being left open for the purpose of allowing shavings and dirt to be swept through to fall to the ground. The lower ends of battens b below the I-beams are connected by cleats g, placed at intervals to support a board G, which is of a width equal to the distance between the side B of one frame and the side B of the adjacent frame. Concrete H is then filled in the mold formed by the board G, the sides B B, and the sheeting F, as shown in Fig. 3. After the concrete is set the framing is removed in the following manner: The ends of the bolts C are loosened. The swinging arms C are rotated about the bolts to disengage the I-beams. In order that the swinging arms may readily disengage the I-beams without disturbing the cement which has formed about them, the edges 0 and c are cut upward from an arc having its center at the bolt 0 and the edge 0 is cut downward from an are having its center at the bolt 0 the radius of each of said arcs being the shortest distance between the said sides c c and the bolt 0 so that when the swinging arm C is swung about its pivot the sides c, and 0 which contact the cement, tend to draw away, so as not to disturb it. The swinging arms having been disengaged from the I-beams, the braces E are pushed back out of engagement with the battens b, and the frame is disengaged from the adjacent frame by uncoupling the cleats g, when the whole framework may be lowered away from the concrete.

WVhat I claim is 1. A framework for use in concrete con struction consisting of frames formed by connected side and end pieces of a form adapted to be placed in the spaces formed between the horizontal beams of the structure, arms secured to the frames and adapted to be swung outward to engage the beams, means for locking the arms after the engagement, members for closing the spaces between the lower edges of adjacent frames, and a covering for the top of the frames.

2. A framework for use in concrete construction consisting of frames formed by connected side and end pieces to be hung in the spaces between the horizontal arms of the structure, joists within each frame, and swinging arms pivoted to the joists and adapted to be swung beneath the frame at their lower ends to engage the beams.

3. A temporary framework for holding the plastic concrete in concrete construction consisting of-frames to be hung in the spaces between the horizontal beams, joists within the frames, swinging arms pivoted to the joists and adapted to pass beneath the frames and to engage the beams, braces adapted to slide upon the joists and to engage the sides of the frames, and means for locking the braces of their engaging frames.

4. In a temporary framework for use in concrete construction the combination of frames to be hung in the spaces between the horizontal beams of the structure, joists with the frame having at each of their ends pivotbolts, swinging arms pivoted upon the bolts and adapted to be swung inward at the lower ends to engage the beams, and slotted braces reciprocating upon the pivot-bolts and adapted to be moved inward to engage the frames.

5. In a temporary framework for concrete construction the combination of frames to be hung in the spaces between the horizontal beams of the structure, the lower edges of the frames being notched at intervals, joists within the frame, swinging arms at the ends .of the joists adapted to pass through the notches and engage the beams, means for locking the swinging arms after the engagement, and strips closing the lower ends of the notches below the arms.

ROBERT ANDERSON. Witnesses:

WALTER F. MURRAY, AGNES McCoRMAcK. 

